Propecia advice

Hi it's been a while since I last posted, and I'll admit that I went against advice post FUE HT that I should take propecia.

For two years I was really happy with HT but my crown is thinning/balding .. I want to take propecia but the one question I can't seem to find the answer to is does Propecia affect the prostate? For example if it's working as it should and I start taking Propecia does it change/shrink it, or does it only change shrink a prostate that needs to be shrunk?

Linked to this question, I've read it can mask prostate issues. Does this mean that the user would need to declare that they're using propecia so that test results would be amended to take this into consideration?

Appreciate any help you can offer!